Perhaps you should try some spelling variations:
imf history » brief history
21 germany » 11 germany, 2 germany, 20 germany
2f history » etf history, ref history, tnf history
2017 18th » 2017 14th, 2017 16th, 2017 4th
20 18th » 2021 18th, 2018 18th, 2019 18th

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %22agriculture AND state %21 germany %((2f history) OR (imf history)) %((20 18th) OR (2017 18th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %21 germany %((2f history) OR (imf history)) %((20 18th) or (2017 18th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %21 germany %((2f history) OR (imf history)) %((20 18th) or (2017 18th)) century%22*.